An approach to vehicle design: In-depth audit to understand the needs of older drivers

An investigation of elderly occupant injury risks based on anthropometric changes compared to young counterparts

OBJECTIVE

The objective of the study was to investigate the difference between elderly and young occupant injury risks using human body finite element modeling in frontal impacts.

METHODS

Two elderly male occupant models (representative age 70-80 years) were developed using the Global Human Body Consortium (GHBMC) 50th percentile as the baseline model. In the first elderly model (EM-1), material property changes were incorporated, and in the second elderly model (EM-2), material and anthropometric changes were incorporated. Material properties were based on literature. The baseline model was morphed to elderly anthropometry for EM-2. The three models were simulated in a frontal crash vehicle environment at 56 km/h. Responses from the two elderly and baseline models were compared with cadaver experimental data in thoracic, abdominal, and frontal impacts. Correlation and analysis scores were used for correlation with experimental data. The probabilities of head, neck, and thoracic injuries were assessed.

RESULTS

The elderly models showed a good correlation with experimental responses. The elderly EM-1 had higher risk of head and brain injuries compared to the elderly EM-2 and baseline GHBMC models. The elderly EM-2 demonstrated higher risk of neck, chest, and abdominal injuries than the elderly EM-1 and baseline models.

CONCLUSIONS

The study investigated injury risks of two elderly occupants and compared to a young occupant in frontal crashes. The change in the material properties alone (EM-1) suggested that elderly occupants may be vulnerable to a greater risk of head and thoracic injuries, whereas change in both anthropometric and material properties (EM-2) suggested that elderly occupants may be vulnerable to a greater risk of thoracic and neck injuries. The second elderly model results were in better agreement with field injury data from the literature; thus, both anthropometric and material properties should be considered when assessing the injury risks of elderly occupants. The elderly models developed in this study can be used to simulate different impact conditions and determine injury risks for this group of our population.

Ergonomics and aging: A bibliometric analysis

BACKGROUND: Despite the prevalence of publications focusing on the trends of the studies on ergonomics, the information of the aging focused studies within these publications is limited. OBJECTIVE: This study aims to provide general information regarding the trends of the studies on ergonomics and aging by using bibliometric analysis techniques and to provide a general view regarding to the development of this field. METHODS: The bibliometric data of the publications on ergonomics and aging were retrieved from the WOS Database and analysed by using the Bibliometrix extension of the R Packet Programme. For the visualisation of the bibliometric data, the Vosviewer programme was used. RESULTS: Analysis results of the 405 papers published between the years of 1979 and 2020 show that main themes were digital human modelling, design for all, workplace ergonomics, transport and vehicle design, kitchen design, human factors, care and vision in old age. CONCLUSIONS: The content of the studies on ergonomics and aging changed from basic elements of ergonomic design for older people to the investigations about computer-aided applications and the effect of the developing technology. Therefore, it can be said that the studies on ergonomics and aging are changing parallel to the development of the technology.